Expansion-fastener.



(No Model.)

, QQ N P aten'ted June l0, I902 E. .1. McGORMICK.

EXPANSION FA'STENER.

(Application filed Ma t. 81, 1898 Ben w d Apr. 10, 1902.)

2 Sheets-$heet I,

A%//////////Af P F L a TES: BY 7 -ATT0RNEY8.

I MLAM Patented lune l0, I902. E. J. MGCOBMICK.

EXPANSION FASTENER.

(Application filed mar. a1, 1598. Ren ewed Apr, 10, 1902.

(no Model.) 2 Sheets-Sheet 2.

WITNESSES: w INVENTOR BY I 1 ATTORNEYS THE mums PEYERs m. rmcrcmma. msumm'on, a. c.

EDWIN J. MCCORMICK, or SYRACUSE, NEW YORK ASSlGNOR TO THE MCCORMICK MANUFACTURING COMPANY, A CORPORATION OF WEST VIRGINIA.

on NEW YORK, Y.,

EXPANSlON-FASTEN ER.

v SPECIFTCATION forming part of Letters Patent No. 702,067, dated June 10, 1902. v Application filed March 31. 1898. ltenewecl April 10, 1902. Serial 1101102334, on) model.)

To all whom it may concern:

Be it known that I, EDWIN J. MCCORMICK, of Syracuse, in the 'county of Onondaga, in theState of New York, have invented new andv useful Improvements inExpansion-Fasteners, of which thefollowing, takenin con-' nection with the accompanying drawings, is

a full, clear, and, exact description.

My invention has for its object the prod'uction of an expansiomfastener which isp'articularly economical in manufacture and practical and eifective'in use and to this end it consists in the combination, construction, and arrangement of the component parts of an expansion-fastener, as hereinafter fully described,and pointed out inthe claims.-

In describing this invention reference-is had to the accompanying drawings, forming part of this specification, in which like letters indicate corresponding parts inall the views." Figure l is an elevation'of myimproved" fastener shown as operativelyengaged-with a portion of a support and the contiguous part of a plate to be securedto'the support. Fig. 2'is a longitudinal sectional view, partly in elevation, taken on line 2 2, Fig. 1. Figs.

3, gt, and 5 are respectively side and end ele-, vations of the detached nut of my improved expansion-fastener. Fig. 6 is atransverse section of said nut, taken on line 6 6, Fig. 3. Fig. 7 is an isometric view of the detached Fig. 8 is a longitudiconstruction of my improved expansion-fastener. Fig. 9 is an isometric view of the detached sleeve of said'modified'construction of fastener- A 1 My improved expansion fastener prefer-' ably consists of a sleeve'A, a nut B, and a threaded shank C.v V I The sleeve A is usually composed of a sheetmetal blank, having its side edges a slightly separated for forming anarrow lengthwise slot a in one side of the sleeve. The opposite side of the sleeve A is'generally formed with a narrow lengthwise slotv 0. which extends from one end face of the sleeve to a point in close proximity to its opposite end face. The

intermediate portion a of the expansionsleeve A is usually more yielding than conias' e em-1 illustrated in Figs. 8 and 9, in which 's'trhction.

I) extend laterally from thebases ofthetapertiguous portions thereof, being preferably formed thinner than the opposite endsof said sleeve by an annular groove 0. in its periphery. A sleeve of the described construction is economical in manufacture, as it is cheaply and quickly formed by suitable stamping and bending machinery from a strip of rolled sheet metal having onelface provided with a lengthwise groove. Saidsleeve is 'also particularly practical and effective, since its yielding or thin central portion reduces its weight and permits endwise compression of the sleeve, being especially liable to buckle outwardly within the opening or socket in which my improved fastener is inserted, and

- thus additionally prevent the withdrawal of the fastener.

It is obvious, however, that the v sleeves of my improved fastener may be formed of uniform thickness from end to end,

figures A represents 'a sleeve of such con- The nut B is preferably substantially conical-and is movable within the inner or rear other and are arranged substantially parallel l with each other incross-section, being ex- 4 tended outwardly from the periphery of the nut B in substantially parallel planes, as best illustrated in Fig. 6. Theengaging surfaces ing ribsb beyond the sidewalls of the-slots a a incline forwardly toward each other, and form the opposite sides of longitudinal faces arranged substantially concentric with the inner face of the sleeve A-and normally en'- gaged with said face. The ribs b are interposed between the ribs 5. b and usually increase in width toward their forward ends, their opposite sides being inclined rearwardly toward each other. The outer faces of said iod I ribs 19 engage the inner face of the sleeve A and facilitate the expansion of said sleeve. The grooves 5 decrease forwardly in width and serve to lighten the weight of the nut B.

The shank G is of any desirable form, size, and construction and is here illustrated as provided at its opposite ends with threads 0 and a head a, for respectively engaging the nut B, anda Washer 0 engaged with the advance end face of the sleeve A.

In the practical use of my improved fastener it is inserted within openings or sockets formed in the articles which it is desired to secure together, as a support D and a plate (Z. The head 0 is then revolved by a suitable wrench, and the nut B is drawn toward said head, thus expanding the inner or rear end of the sleeve A and compressing the sleeve end- 'wise by buckling the yielding or thin intermediate portion of the sleeve outwardly within said openings or sockets. When the sleeve A is sufliciently expanded, the parts D cl are firmly and positively secured together.

The construction and operation of my improved expansion-fastener will now be readily understood upon reference to the foregoing description and the accompanying draw- 1n gs.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- I 1. The combination of a sleeve consisting of a sheet-metal blank having its side edges separated for forming a lengthwise slot in the sleeve, and a substantially conical nut movable within the sleeve and having its periphery engaged with the inner face of the sleeve and provided with a tapering rib movable in said slot, substantially as and for the purpose described.

2. The combination of a sleeve having an intermediate portion formed more yielding than contiguous portions thereof, and means for compressing the sleeve endwise and buckling outwardlysaid intermediate portion, substantially as and for the purpose set forth.

The combination of a sleeve having an intermediate portion formed of less thickness than its ends and havingone of its ends movable endwise toward the other for buckling outwardly said intermediate portion of the sleeve and an expanding-nut movable within said one of the ends of the sleeve; substantially as and for the purpose described.

4. The combination ofa sleeve consisting of a sheet-metal blank having its intermediate portion formed of less thickness than its ends and having its side edges separated for forminga lengthwise slot in the sleeve, and a nut movable with the sleeve and provided with a tapering rib movable in said slot, substantially as and for the purpose set forth.

5.- The combination of a sleeve having a lengthwise slot, and a substantially conical nut movable within the sleeve and having its periphery engaged with the inner face of the sleeve and provided with a longitudinal rib movable in the slot of the sleeve, said rib having its opposite sides inclined forwardly toward each other, and having opposite portions thereof extended outwardly from said periphery in substantially parallel planes, substantially as and for the purpose specified.

6. The combination of a sleeve having a lengthwise slot, and a substantially conical nut movable within the sleeve and having its periphery engaged with the inner face of the sleeve and provided with a tapering rib projecting into the slot and with engaging surfaces extending laterally from the base of the rib beyond the side walls of the slot and engaged with the inner face of the sleeve, substantially as and for the purpose set forth.

7. The combination of a sleeve having a lengthwise slot, and a substantially conical nut movable within the sleeve and havingits periphery engaged with the innerfacc of the sleeve and provided with longitudinal ribs having their outer faces engaged with the inner face of the sleeve, substantially as and for the purpose described.

8. The combination of a sleeve having a lengthwise slot, and a substantially conical nut movable within the sleeve and having its periphery provided with longitudinal ribs increasing in width toward theirforward ends and having their outer faces engaged with the inner face of the sleeve, substantially as and for the purpose specified.

9. The combination of a sleeve having a lengthwise slot, and a substantially conical nut.movable within the sleeve and having its periphery engaged with the under face of the sleeve, and provided with longitudinal grooves decreasingin width toward their for ward ends, substantially as and for the purpose set forth.

10. Thecombination ofa sleevehavingseparated lengthwise slots, and a substantially conical nut movable within the sleeve and having its periphery provided with longitudinal faces arranged substantially concentric with the inner face of the sleeve for engaging said inner face, and substantially longitudinal ribs projecting from said faces into the slots of the sleeve and having their opposite sides engaged with the walls of said slots, substantially as and for the purpose described.

11. The combination of a sleeve having sep arated lengthwise slots, and a substantially conical nut movable within the sleeve and provided with separated longitudinal ribs projecting from its periphery and movable in the slots of the sleeve, said nut being also provided with additional ribs interposed between the former ribs and having their outer faces engaged with the inner face of the sleeve, substantially as and for the purpose specified.

12. The combination of a sleeve having separated lengthwise slots, and a substantially conical nut movable within the sleeve and provided with. separated longitudinal ribs y 13; The combination of a sleeve having separated lengthwise slots, and a substantiallyconical nut movable within the sleeve and provided with separated longitudinal ribs projecting from its" periphery into the slots of the sleeve and having their opposite sides inclined forwardly toward'eacliotherand op-. posite portions" of said sides extended out I wardly from the periphery of the nut in substanti'ally parallel planes, said nut being also provided with engaging surfaces extending laterally from the bases of the ribs and incliningforwardlytowardeachother, substantially as and for the purpose'described;

14. As anew article; of manufacture, the

' herein-described expansion sleeve, the same being composed'of a'sheet-metal blank having its side edges separated forforming intermediate portion formed of less thickness a. lengthwise slot in the sleeve, and having an thanits ends and having one of its ends movable endwise toward the other for buckling outwardly said intermediate portion of the sleeve,substantially as and for the purpose 15;As a new article of the samebeing formed substantially conical and-having its periphery provided with projecting longitudinal ribs the opposite sides of engaging surfaces extending laterally from the bases of theribs and inclining forwardly toward each'other, and-additional ribs interstantially as and for the purpose set'forth. In testimony whereof I have hereunto signed-my name, in thepresence of two-attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 24th day of March, 1898.

, EDWIN J. MCCORMICK.

' Witnesses: Y K. H. THEoBALD, D. LAVINE.

manufacture, the herein-described nut for expansion-fasteners,

which incline forwardly toward each other,

posed between said engaging surfaces,'sub- 

